81270960 has 80 divisors (see below), whose sum is σ = 262911744. Its totient is φ = 20728576.

The previous prime is 81270953. The next prime is 81270977. The reversal of 81270960 is 6907218.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1842 + ... + 12881.

Almost surely, 2^81270960 is an apocalyptic number.

81270960 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81270960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131455872).

81270960 is an abundant number, since it is smaller than the sum of its proper divisors (181640784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81270960 is a wasteful number, since it uses less digits than its factorization.

81270960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14762 (or 14756 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 81270960 is about 9015.0407652988. The cubic root of 81270960 is about 433.1567933076.

The spelling of 81270960 in words is "eighty-one million, two hundred seventy thousand, nine hundred sixty".